How can I save the optimal values of a certain variable X that appears in one model, and reuse in another model that is otherwise unrelated, i.e. the save/restart facilities are not appropriate.
Write the level and the marginals of the variables you are interested in into a GDX container and load that GDX container into your second model.
At the end of the first model add something like (assuming that you are interested in x): execute_unload 'results.gdx', x;
and load this data into your second model before the solve statement: execute_loadpoint 'results.gdx', x;
Another approach is to use the savePoint option. Just add a line option savePoint=1;
or option savePoint=2;
to your first model before the solve statement. In your second model add the line execute_loadpoint 'name_of_the_first_model_p.gdx';
.